Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, Max-Born-Strasse 2a, 12489 Berlin, Germany.
Opt Lett. 2010 May 1;35(9):1491-3. doi: 10.1364/OL.35.001491.
We report on the generation of femtosecond pulses at 160 nm with energies up to 240 nJ at 1 kHz repetition rate and sub-50-fs pulse duration. This pulse energy is a 1-order-of-magnitude improvement compared with previous sub-100-fs sources in this wavelength range. The pulses are generated by four-wave difference-frequency mixing process between the fundamental of a Ti:sapphire laser and its third harmonic in argon. Pulse duration measurements are achieved by pump-probe ionization of Xe gas providing the cross correlation between the fifth harmonic and the fundamental.
我们报告了在 1 kHz 重复率和亚 50 飞秒脉冲持续时间下，在 160nm 处产生高达 240nJ 能量的飞秒脉冲。与之前在该波长范围内的亚 100fs 源相比，这种脉冲能量提高了一个数量级。这些脉冲是通过钛宝石激光的基频和氩气中的三倍频之间的四波差频混合过程产生的。通过 Xe 气体的泵浦探测离化进行脉冲持续时间测量，从而提供了五次谐波和基频之间的互相关。
